<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Fancy Buttons</title>
  <link rel="stylesheet" href="index.css">
</head>

<body>
  <button class="btn btn-border-pop">border pop</button>
  <button class="btn btn-background-slide">background slide</button>
  <button class="btn btn-background-circle">background circle</button>
  <button class="btn btn-background-underline">background underline</button>
</body>

</html>